Remove mojo_converter.h (#2879)

We can use the one from //lib/tonic instead.

flutter/lib/ui/painting/image_decoding.cc

@@ -6,11 +6,11 @@
 
 #include "flow/texture_image.h"
 #include "flutter/lib/ui/painting/image.h"
-#include "flutter/tonic/mojo_converter.h"
 #include "glue/movable_wrapper.h"
 #include "glue/trace_event.h"
 #include "lib/tonic/dart_persistent_value.h"
 #include "lib/tonic/logging/dart_invoke.h"
+#include "lib/tonic/mojo_converter.h"
 #include "lib/tonic/typed_data/uint8_list.h"
 #include "sky/engine/platform/mojo/data_pipe.h"
 #include "sky/engine/platform/SharedBuffer.h"

flutter/tonic/BUILD.gn

@@ -18,7 +18,6 @@ source_set("tonic") {
     "dart_snapshot_loader.h",
     "dart_state.cc",
     "dart_state.h",
-    "mojo_converter.h",
   ]
 
   deps = [

flutter/tonic/mojo_converter.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef FLUTTER_TONIC_MOJO_CONVERTER_H_
-#define FLUTTER_TONIC_MOJO_CONVERTER_H_
-
-#include "lib/tonic/converter/dart_converter.h"
-#include "mojo/public/cpp/system/handle.h"
-
-namespace tonic {
-
-template <typename HandleType>
-struct DartConverter<mojo::ScopedHandleBase<HandleType>> {
-  static mojo::ScopedHandleBase<HandleType> FromDart(Dart_Handle handle) {
-    uint64_t raw_handle = 0;
-    Dart_Handle result = Dart_IntegerToUint64(handle, &raw_handle);
-    if (Dart_IsError(result) || !raw_handle)
-      return mojo::ScopedHandleBase<HandleType>();
-
-    HandleType mojo_handle(static_cast<MojoHandle>(raw_handle));
-    return mojo::MakeScopedHandle(mojo_handle);
-  }
-
-  static Dart_Handle ToDart(mojo::ScopedHandleBase<HandleType> mojo_handle) {
-    return Dart_NewInteger(static_cast<int64_t>(mojo_handle.release().value()));
-  }
-
-  static mojo::ScopedHandleBase<HandleType>
-  FromArguments(Dart_NativeArguments args, int index, Dart_Handle& exception) {
-    int64_t raw_handle = 0;
-    Dart_Handle result =
-        Dart_GetNativeIntegerArgument(args, index, &raw_handle);
-    if (Dart_IsError(result) || !raw_handle)
-      return mojo::ScopedHandleBase<HandleType>();
-
-    HandleType mojo_handle(static_cast<MojoHandle>(raw_handle));
-    return mojo::MakeScopedHandle(mojo_handle);
-  }
-};
-
-}  // namespace tonic
-
-#endif  // FLUTTER_TONIC_MOJO_CONVERTER_H_